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MIAT: Modular R-wrappers for flexible implementation of MaxEnt distribution modelling 
Mazzoni, Sabrina; Halvorsen, Rune; Bakkestuen, Vegar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
The maximum entropy (MaxEnt) method has gained widespread use for distribution modelling, mostly because of the practical simplicity offered by the maxent.jar software. Whilst MaxEnt was originally described as a machine ...
Ectomycorrhizal and saprotrophic fungi respond differently to long-term experimentally increased snow depth in the High Arctic 
Mundra, Sunil; Halvorsen, Rune; Kauserud, Håvard; Bahram, Mohammad; Tedersoo, Leho; Elberling, Bo; Cooper, Elisabeth J.; Eidesen, Pernille Bronken (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Changing climate is expected to alter precipitation patterns in the Arctic, with consequences for subsurface temperature and moisture conditions, community structure, and nutrient mobilization through microbial belowground ...
Different bacterial communities in ectomycorrhizae and surrounding soil 
Vik, Unni; Logares, Ramiro; Blaalid, Rakel; Halvorsen, Rune; Carlsen, Tor; Bakke, Ingrid; Kolstø, Anne-Brit; Økstad, Ole Andreas Løchen; Kauserud, Håvard (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
Several eukaryotic symbioses have shown to host a rich diversity of prokaryotes that interact with their hosts. Here, we study bacterial communities associated with ectomycorrhizal root systems of Bistorta vivipara compared ...
Single-tree influence on understorey vegetation in five Chinese subtropical forests 
Liu, Hai Ying; Halvorsen, Rune (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
The aim of this study is to examine the effect of individual canopy tree on the species composition and abundance of understorey vegetation in subtropical forests, by applying a model for tree influence on understorey ...
Characterisation and mapping of landscape types, a case study from Norway 
Erikstad, Lars; Uttakleiv, Lars Andre; Halvorsen, Rune (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
The European Landscape Convention emphasises the human perception of landscapes in its definition of the landscape, and promotes citizen participation in landscape management processes. On the other hand, landscape definitions ...
Bunching up the background betters bias in species distribution models 
Vollering, Julien Martin Marie; Halvorsen, Rune; Auestad, Inger; Rydgren, Knut (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
Sets of presence records used to model species’ distributions typically consist of observations collected opportunistically rather than systematically. As a result, sampling probability is geographically uneven, which may ...
Sampling bias in presence-only data used for species distribution modelling: theory and methods for detecting sample bias and its effects on models. 
Støa, Bente; Halvorsen, Rune; Mazzoni, Sabrina; Gusarov, Vladimir (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
This paper provides a theoretical understanding of sampling bias in presence-only data in the context of species distribution modelling. This understanding forms the basis for two integrated frameworks, one for detecting ...
Advancing restoration ecology: A new approach to predict time to recovery 
Rydgren, Knut; Halvorsen, Rune; Töpper, Joachim Paul; Auestad, Inger; Hamre, Liv Norunn; Jongejans, Eelke; Sulavik, Jan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
1. Species composition is a vital attribute of any ecosystem. Accordingly, ecological restoration often has the original, or “natural,” species composition as its target. However, we still lack adequate methods for predicting ...
Point of view: error estimation in field assignment of land-cover types 
Eriksen, Eva Lieungh; Ullerud, Heidrun Asgeirsdatter; Halvorsen, Rune; Aune, Sigrun; Bratli, Harald; Horvath, Peter; Volden, Inger Kristine; Wollan, Anders Kvalvåg; Bryn, Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Questions: Substantial variation between observers has been found when comparing parallel land-cover maps, but how can we know which map is better? What magnitude of error and inter-observer variation is expected when ...
Composite landscape predictors improve distribution models of ecosystem types 
Simensen, Trond; Horvath, Peter; Vollering, Julien; Erikstad, Lars; Halvorsen, Rune; Bryn, Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Aim: Distribution modelling is a useful approach to obtain knowledge about the spatial distribution of biodiversity, required for, for example, red-list assessments. While distribution modelling methods have been applied ...
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